Using perfectly-preserved rolls of analog film, DxO scientists start the process by taking shots of different carefully designed and calibrated targets.
Gretag color targets and a wide dynamic range are used so as to perfectly reconstitute film color and contrast, as well as to restore the form, the texture, and the intensity of the film grain. The scientists use exposure bracketing in order to take into account the wide latitude of exposure for these films.
To ensure rigorous development, the exposed films are sent to the best professional laboratories inn Europe (Picto and Arkalab, Kodak for Ektachrome) and in the United States (Duggal).
The developed films are then scanned using a scanner that has been calibrated to handle 16-bit very-high-resolution files of up to 50 MB in size, after which the scans are analyzed using DxO Analyzer, the industry reference in matters of image quality evaluation.
Based on the scan results, DxO scientists characterize and model the response of each film in terms of colors, contrast, and grain, with the last step consisting of taking test shots of different subjects in real-life conditions to validate the results.